The deployment of Wireless communications, localisation and perception technologies are enabling the sharing of information between passenger vehicles and with the infrastructure. An electronic horizon could be built that will be several times larger than what vehicle onboard perception systems could provide and likely at a lower cost. As a result the situational awareness of drivers of such vehicles will be enlarged allowing driving assistance systems to be more predictive. The results of a Use Case related to intersection safety, the crossing of an intersection by an Emergency Service Vehicle (ESV) is examined in details in this paper. The purpose is to convey the preliminary results of the technologies deployed as part of SAFESPOT, a large European project addressing safety related applications. It includes details of the various system components and analysis of the technologies deployed.